Tailpipe extension silencer with venturi air extrainment

ABSTRACT

A tailpipe extension for vehicles with internal combustion engines is a one-piece tubular member having a venturi tube portion formed therein and side openings immediately downstream from the waist of the venturi for inducting air to mix with the exhaust gases. The exhaust opening is cut at an angle to divert exhaust gases downward.

United States Patent inventor James H. Lavallee 2542 Front St., SanDiego, Calif. 92103 Appl. No. 49,237

Filed June 24, 1970 Patented .luly13,1971

TAILPIPE EXTENSION SILENCER WITH VENTURI AIR EXTRAINMENT 4 Claims, 3Drawing Figs.

U.S.Cl. 181/51, 181/72, 60/30 R int. Cl. F0ln l/08, F0111 1/14, FOln7/20 Field of Search 60/30 R;

[56] References Cited UNITED STATES PATENTS 1,217,615 2/1917 McDowell181/72 1,794,276 2/1931 Bowes 181/51 2,013,956 9/1935 Heath 181/433,095,944 7/1963 Buxton 181/61 X FOREIGN PATENTS 397,331 2/1966Switzerland 181/57 Primary Examiner--Robert 8. Ward, Jr. Attorney-Lyonand Lyon ABSTRACT: A tailpipe extension for vehicles with internalcombustion engines is a one-piece tubular member having a venturi tubeportion formed therein and side openings im mediately downstream fromthe waist of the venturi for inducting air to mix with the exhaustgases. The exhaust opening is cut at an angle to divert exhaust gasesdownward.

TAILPIPE EXTENSION SILENCER WITH VENTURI AIR EXTRAINMENT and downstreamthereof there are provided a pair of laterally extending tubularopenings This invention relates to a tailpipe section or extension for Ithe exhaust pipe of-vehicles havinginternal combustion engines andcomprises essentially acne-piece tubular member having lateral openingsintermediate its ends adjacent to which there is venturi tube sectionupstream from the lateral openings, which causes the exhaust gases toincrease in velocity and thus in their power to induct air into thelateral openings to dilute the exhaust gases and promote completecombustion thereof. The device is preferably made of neoprene whichcauses the device to act as a noise-reducing member.

In addition to the functions of diluting the exhaust gases 7 with airand promoting complete combustion thereof and the noise reduction abovereferred to, the device of thisinvention is lightweight, durable,economical, easy to manufacture and easy to install. These and otherobjects, features and advantages will be apparent from the annexedspecification in which:

I FIG. I is a side view of the device embodying the present inventioninstalled on a tailpipe.

FIG. 2 is an enlarged section taken on the line 2-2 of FIG. 1. FIG. 3 isa section taken along the line 3-3 of FIG. 2. Referring now moreparticularly to the drawings, the tailpipe section or extension 10 is aunitary member generally tubular in disposed substantially adjacentconstruction and preferably formed of neoprene and has a portion 11which is narrowed as at 12 to present a venturi tube section having awaist 13. Substantially adjacent the waist 13 14 and 15. Downstream fromthe tubular openings 14 and 15 there is a tubular section 16 whichterminates in an exhaust opening 17, which is cut at an angle for thepurpose of directing the exhaust gases downward. A clamp 18 may be usedfor attaching the extension 10 to a conventional exhaust pipe I9.

While there has been described what at present is considered a preferredembodiment of the present invention it will be appreciated by thoseskilled in the art that various modifications and changes can be madetherein without departing from the essence of the invention.

What I claim is:

l. A tailpipe section or extension for the exhaust pipes of internalcombustion engines comprising a tubular member having a venturi tubeformed therein, said venturi tube having a waist, said tubular memberhaving at least one lateral opening the end of said waist and downstreamfrom said waist whereby air is drawn into said section and mixed withthe exhaust gases when said engine is running.

2. A tailpipe section as set, forth in claim I formed entirely ofneoprene.

3. A tailpipe section as set forth in claim 1 including a pair ofdiametrically opposed lateral openings disposed substantially'adjacentto and downstream from said waist.

4. A tailpipe section as set forth in claim 1 including a dischargeopening at the end thereof cut at an angle to and vertical with theupper side extending beyond the lower side.

1. A tailpipe section or extension for the exhaust pipes of internalcombustion engines comprising a tubular member having a venturi tubeformed therein, said venturi tube having a waist, said tubular memberhaving at least one lateral opening disposed substantially adjacent theend of said waist and downstream from said waist whereby air is drawninto said section and mixed with the exhaust gases when said engine isrunning.
 2. A tailpipe section as set forth in claim 1 formed entirelyof neoprene.
 3. A tailpipe section as set forth in claim 1 including apair of diametrically opposed lateral openings disposed substantiallyadjacent to and downstream from said waist.
 4. A tailpipe section as setforth in claim 1 including a discharge opening at the end thereof cut atan angle to and vertical with the upper side extending beyond the lowerside.